Molding-machine



(No Model.) 2 Sheets-Sheet.1. A. L. STEVENS.

MOLDING MACHINE.

No. 360,119. Patented Mar. 29', 1887.

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(No Model.) 2 sheets-sheet 2. A. L. STEVENS.

MOLDING MACHINE.

Patented Mar. 29, 1887.

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Unire STATES ATENT pFICE.

ARTHUR L. STEVENS, OF PHILADELPHIA, PENNSYLVANIA.

MOLDINGIVIACHINE.

SPECIPICATEON forming part of Letters Patent No. 360,119, dated March 29, 1887.

Serial No. 2I6,l91. (No model.)

To all whom it may concern.-

Be it known that l, ARTHUR L. STEVENS, a citizen of the -United States, residing at Philadelphia, in the State of Pennsylvania, have invented an Improved Molding- Machine, of which the following is a specification.

My invention relates` more particularly to machinery for molding ear-wheels, and is fully described in the following specification and illustrated in the accompanying drawings, which form a part thereof.

Figure 1 is a longitudinal section through the machine. Fig. 2 is a detail in perspective ot' the automatic sand weighing or measuring device. Fig. 3 is a section through the sand` distributing cones. Fig. 4 is a plan ofthe top ofthe cones, while Fig. 5 is a plan of the bottom of same.

In Fig. 1, 1 is a pit for the reception of sand. Running over suitable wheels in the pit l is the elevator belt or chain 2, provided with buckets 3. Near the top ofthe machine, and supported by suitable bearings, are wheels 4, and below these are the guide-wheels 5.

6 is a chute having one or more spouts, 7, for delivering the sand into the buckets 8. ln the bottom of the spouts are openings titted with dampers 9, which are provided with the cranks 10 and connected to the hinged piece 12 by the connecting-rod 11. The buckets S Vare hung upon trunnions 13 in bearings 14 and 15. Bearing 15 is placed upon the hinged piece 12. Thepiece 12 is raised against the stop 16 by weights 19, suspended by the cord or chain 17, running over wheels 1S. From the chute 6 is a spout, 20, for discharging superfluous sand into the pit 1. Directly under the bucket 8 is the conical hopper 21. Joined to the bottom of this hopper is the neck 22, in the form of atruncated cone, with its widest end or opening downward where it joins the bottom casing, 23. This bottom casing is nearly as large in diameter as the ask to be filled. Suspended in the interior of the casing 23 by supports 50 are a series of concentric conical distributers, 24, 25, 26, 27, and 28. Under these cones the car 30, provided with a ilask, 29, is placed. Afterthe iiask has been lled it is pushed under the cylinder or drum 31, where the surface is struck with a sweep, 32, carried on the lower end of the vertical I shaft 33. This shaft is capable of being raised and lowered by any suitable device, and is caused to rotate by thebevel-gears 34. Gears 34 follow gear 35, driven by pulley and belt. The cylinder 3l may be provided with an opening, through which any sand that may be removed by the sweep will be thrown into the pit 1. Such au opening is not shown, as it is not essential to the operation ot' the machine.'

From under the drum 3l the ear and ilask are moved onto the rails 36 on top ofthe ram or plu ngel.' 37. This ram is raised 0r lowered by liquid-pressure in the cylinder 3S. Cylinder 3S is suspended in apit, 39, from the girders 40. Upon the bottom girders,ou both sides of the cylinder' 3S, are the posts 41. To these posts is secured the pattern 42, which is to define a part of the mold. The posts on both sides are connected at the top by girders 43. Between these girders are cross girders 44, upon which is supported the cylinder 45, having the ram or plunger 46. To the lowerend Vof the ram 46 is secured, by means of screws 47, the pattern 4S, which, in conjunction with the pattern 42, delines the mold.

As every mold is composed of two parts, known as the cope7 and drag, I prefer to build these machines with separate distributers, sweeps, and presses foreach part. Fig. 2 shows how the buckets 8 are placed on each side of chute 6, with spout 7 over each. Distribntingcones are placed under each of these buckets, and I place two cylinders, 3l, side by side forthe cope and drag, and also two presses. Fig. 1 shows the distributers, sweep, and press for the drag. Those for the cope would be duplicates ot' these, and therefore are not shown. The hopper 2l, where itjoius the neck 22, is much narrower than the diameter ofthe bucket 8, for the purpose of collecting the sand in a compact body or mass to be cut and distributed as evenly as possible by the cones. The neck 22 has its lower end somewhat larger than its top,to prevent clogging and to allow the sand to fall freely upon the upper edges of the dis tributingcones 24, 25, 26, 27, and 28. These cones have the size of their upper and lower openings so regulated as to distribute the sand over the bottom of the flask with a depth varying from the center outward, to conform approximately to the contour ofthe wheel to be molded. In Fig. 3 such a contour is represented by the dotted line 49.

Referring to Fig. 4, it will be seen that the concentric openings between the cones 24 and 25 and between 25 and 26 are proportionately much larger than between the other concs,

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while in Fig. 5 it will be seen that those spaces are much narrower than the spaces between the other cones.

It will be further noticed by reference to Fig. 3 that the Varying depth of sand required in ask, as represented by the dotted line 49, is the deepest under the spaces between 24 and 25 and between 25 and 26. As these spaces receive the greatest proportionate quantity of sand from the hopper and distribute it in a less proportionate area in the flask, the sand thus distributed must vary proportionately in depth. Byehanging the-relative area ot'- any of the concentric spaces at the top, varying quantities of sand may be discharged through the several spaces, and by varying the diameter ofthe cones at the bottom these varying quantities of sand `may be distributed in the iiask in rings or ridges with a resulting graduated depth to approximate the depth rei quired in the completed mold. In all cases the spaces between any two cones should expand in size fro m the top downward to prevent clogging or choking of the sand. Any number of cones may be used that is found necessary by the size and character of the work.

The operation of the machine is as follows: Sand, being supplied to the pit 1, is elevated to the bucket 8. When the required quantity has been obtained, the weight of the bucket exceeding that of the weight 19, the hinged piece /12 is forced down, and through the connecting-rod 11 and crank 10 raises the damper 9, as shown by dotted line in Fig. 2. The sand from the elevator buckets now falls through the opening thus made into the chute 6, down the spout 20, back to-the pit 1. A flask having been placed under the distributing-cones, a work man swings the bucket 8 upon the trunnious, dumping the Sand into the hopper 21. The weight 19 now raises the hinged piece 12 against the stop 16, closing the damper 9 and allowing the sand to again till the bucket 8. The sand dumped from thebucket into ihehopper 21 is collected in a compact body in the neck 22, then falls through the distributing-cones into the flask with such varying depth as before described. From under the distributing-cones the flask is moved under the cylinder or drum 31. The rotatingV sweep is caused to descend, sweeping and evening the surface of the sand, producing a further and more perfect distribution, and shapes the surface to the required contour. Any superfluous sand is removed by the sweep and thrown by centrifugal force into the drum 31, from which it is removed. The tlask, with the sand thus prepared by the sweep, is moved onto the press. Ram 37 is then forced npward, imprinting the sand in the flask against the pattern 42, where it remains until the ram 46 is forced down, imprinting pattern 48 against the remaining portions ot' the sand. The ram 37 is then allowed to fall, while the ram 46 and .pattern 48 follow it, until the flask and sand descend below pattern 42,v when the pattern 48 is raised. The object of this movef ment is to remove pattern 42 from the sand while the latter is held and supported by. the pattern 48. i

A uniform density in the mold is obtained by the quantity of sand inthe flask being apportioned according to its depth afterpressing; but this, however, is not a part of my in.

weight 19, and the hopper 21, and a series of i concentric distributing-cones, substantially as described. l

4. In a molding-machine, the combination of a measuring-bucket, conical hopper with diverging neck and a series of concentric conical distributing-cones, and a ask.

5. In a molding-machine, the combination of the elevator-buckets 3, spout 7, damper 9, and the measuring-bucket 8, trunnions 13, hinged piece 12, connecting-rod 11, and weight 19, substantially as described.

6. In a molding-machine, the combination of a measuring-bucket, conical hopper, concentric distributing-cones, and a revolving sweep, substantially as shown and described.

7. In a molding-machine, the combination of the measuringbucket 8, hopper 21, with neck 22, distributing-cones 24, 25, 26, 27, and

28, and sweep 32 anddrum 31, substantially as described.

y8. A molding-machine consisting of a meastiring-bucket, conical hopper, concentric conical distributers, arevolving sweep, and a press with a ask-supporting ram adapted to move upward against a pattern and a pattern-carrying ram adapted to move downward against the sand, substantially as herein described and illustrated.

9. A machine for molding car-wheels, consisting of the bucket 8, hopper 21, neck 22, cones 24, 25, 26, 27, and 28, drum 31, cylinder 38, ram 37, pattern 42, cylinder 45, ram 46, and pattern 48.

10. A machine for molding. car-wheels, consisting ofthe flask 29, spout 7, damper 9, spout 20, bucket 8, trunnions 13, hinged piece 12, connecting-rod 11, weights 19, hopper 21, with neck 22, distributing-cones 24, 25, 26, 27, and 28, sweep 32, drum 31, ram 37, pattern 42, ram 4G, pattern 48, and adjusting-screws 47.

ARTHUR L. STEVENS.

Vi tnesses:

AMos STEVENS, H. FLEcKENsrnIN.

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